首页|Depression behaviors of N-thiourea-maleamic acid and its adsorption mechanism on galena in Mo-Pb flotation separation
Depression behaviors of N-thiourea-maleamic acid and its adsorption mechanism on galena in Mo-Pb flotation separation
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In present study,a novel organic depressant N-thiourea-maleamic acid (TMA) was synthesized and applied as a galena depressant in the flotation separation of Mo-Pb ores.The depression behaviors of TMA were tested through flotation experiments.A wider separation window for single minerals over 90.0％ was obtained at 30.0 mg/L TMA,confirming that TMA could depress galena significantly,while effected molybdenite floatability slightly.An effective separation was obtained for artificially mixed min-erals and actual Mo-Pb ores.The adsorption mechanism on galena was revealed by UV-Vis spectra,zeta potential tests,Fourier transform infrared spectroscopy (FT-IR) analysis,contact angle tests and X-ray photoelectron spectroscopy (XPS) analysis.The zeta potentials of galena became more negative and the contact angle of galena dropped from initial 74.36° to 57.8° with 30.0 mg/L TMA depressant,inferring that TMA had adsorbed on galena surface.The analysis results of UV-Vis spectra,FT-IR and XPS gave fur-ther evidence that TMA might chemisorb on galena surface via Pb sites on galena surface and the thiourea group in TMA molecular structure,while the carboxyl group played a role of hydrophilicity.
State Key Laboratory of Mineral Processing,Beijing 102628,China
BGRIMM Technology Group,Beijing 102628,China
China-South Africa Belt and Road Joint Laboratory on Sustainable Exploration and Utilization of Mineral Resources,Beijing 102628,China
State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming 650093,China
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National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationBGRIMM fund program
NETL
NSTL
万方数据
维普
